Film race for cameras



Jly 5, 1932. H. G. CUNNINGHAM FILM RACE FOR CAMERAS Filed June 16, 1930 .m ...Illlllll n IN VEN TOR.

APatented July 5, 1932 y.UNITED STATES HARRY G. CUNNINGHAM, F LOS ANGELES, CALIFORNIA FILM.' RACE FOR CAMERAS Application led June 16,

My invention relates to the film race through which the film of a camera moves and which operates to intermittently press said film against the camera aperture frame U` during the intermittent exposure, whereby to hold the film snugly over the opening 4during the exposure thereof tothe light through said opening. In making talking or sound pictures, it is necessary to eliminatey everything 10 which produces any noise or clicks or other sound which can be reproduced in connection withk the picture. In the present film races, there is one solid plate back of the film which moves against it and presses the film over the aperture closely kso as to get better results in takin pictures, and this solid plate is objectiona le in that it makes a noise which perceptible in connection with talking pictures. I have conceived the idea of replacing this solid plate with a plurality of cross wires whereby to contact and press the film against the aperture frame with these cross wires, thus providing a minimum of contact and yet getting the desired result of holding` the film snugly against thegaperture frame for the picture.

In order to explain my invention, I have illustrated the same on the accompanying sheet of drawin which I will now describe.

Figure 1 is a ace view of a film race showing the opening in the plate withy the cross wires for contacting and pressing a film over the aperture fame; y Figure 2 is a vertical sectional view thereof taken on line 2 2 of Fig. 1 and Fig. 3 is a similar view with the film race moved back from the aperture plate, as it is during the movement 'lo the film.

Referring now in detail to the drawing, 4 designates an aperture frame, on a body member 5, with aperture, therethrough for the light to pass to the film, F. The film race comprises two spacedplates 0r frames, 7 and 8, secured together to be moved as a unit to and from the aperture frame 4, and between these plates the film F moves. Instead of making the plate'or frame 7 solid, as it is now made, I havel out out an opening 7 therein, and have mounted on said '5 plate, across said opening 7', a plurality of 1930. Serial No. 461,410.

` gaging and pressing a film snugly over the Iaperture of the aperture frame 4, and to thus eliminate an objectionable click or sound which is present when a solid plate is used for the plate 7.

In Fig. 2 the film race is shown moved forwardly with the film F pressed snugly over the light aperture 6, the view being enlarged and exaggerated to better illustrate the use and operation of the device. In Fig. 3, this film race is shown moved away from the v aperture frame for the movement of the film between the plates or frame members 7 and 8, constituting what I have called the film race.

While I have shown and described one embodiment of my invention, being a plate or frame structure with an opening therethrough, with the cross wires for contacting the film as said plate is moved against the film fory the purpose` of pressing it against the aperture frame, I do not limit my invention to the details of construction and arrangement shown, except as I may be limited ,y

by the hereto appended claims.

I claim:

l. In a film race, two spaced frame members between which a film can run, said frame members being open in their middle portions, one of said members having a plurality of cross wires across its opening to engage and press the film over the light aperture.

2. In a film race, two supporting yokes, two spaced frame members supported thereby to be moved as a unit, one of said frame members havingcross wires across its opening to contact and press a film against an aperture frame.

3. In combination with an aperture frame through `which light can pass, a plate over said frame, said plate being open over the opening in said aperture frame, and a plurality of Wires across said opening in said plate and adapted to press a film against said aperture frame.

Signed at Los Angeles, Los Angeles County, California, this 7 day of June, 1930.

HARRY G. CUNNINGHAM. 

